[OpenBIOS] Sparc64 OpenBIOS
Mark Cave-Ayland
mark.cave-ayland at siriusit.co.uk
Sun Nov 15 22:01:35 CET 2009
Nick Couchman wrote:
> I assume this is the point where I really need the debugger and the breakpoints so that I can step through the rest of the boot process piece-by-piece.
>
> -Nick
Yeah. I actually started on trying to get a Solaris 9 image to boot
under Qemu at the beginning of the year, which resulted in several fixes
to the Fcode evaluator so that it can now load the Forth bytecode
successfully. At this point, I realised that I then needed a Forth
debugger before I could continue any further, hence the recent debugging
patches to the list.
So, I took a deep breath and used the debugger to step through the boot
process of a SPARC64 Milax CD image to see what was happening:
: read-disk ( 8002000 800 8000 ffe4adc8 )
00000000ffe32458: dup ( 8002000 800 8000 ffe4adc8 ffe4adc8 )
00000000ffe32460: >r ( 8002000 800 8000 ffe4adc8 )
00000000ffe32468: 0 ( 8002000 800 8000 ffe4adc8 0 )
00000000ffe32470: swap ( 8002000 800 8000 0 ffe4adc8 )
00000000ffe32478: cif-seek ( 8002000 800 ffffffffffffffff )
00000000ffe32480: do?branch ( 8002000 800 )
00000000ffe32490: (") ( 8002000 800 ffe324a0 b )
00000000ffe324b0: die
seek failed
Can't mount root
Aborted.
It's fairly obvious to see that the seek is failing since it returns -1.
But which device is it failing on?
0 > dev-ih ihandle>phandle u. ffe2b830 ok
0 > show-devs
...
ffe2b830 /packages/misc-files
...
This implies that it is the seek in /packages/misc-files which is
failing, although I'm not really sure at the moment why the read-disk
word (which is part of the Milax bootloader) isn't trying to seek on
/packages/hsfs-file-system instead?
ATB,
Mark.
--
Mark Cave-Ayland - Senior Technical Architect
PostgreSQL - PostGIS
Sirius Corporation plc - control through freedom
http://www.siriusit.co.uk
t: +44 870 608 0063
Sirius Labs: http://www.siriusit.co.uk/labs
More information about the OpenBIOS
mailing list